president obama has led a dramatic escalation in drone strikes. the majority of people killed have been alleged militants. but there are militants -- civilians that are among the dead. from islamabad, our reporter has this story. >> in the skies overhead, day and night. in the pakistani tribal belt, there is no escape from cia drones and no knowing where they will strike. this was one of america's biggest victories, a strike in june that killed al qaeda's second in command. the u.s. says drones are weapons that limit collateral damage. we met some of those on the receiving end who beg to differ. they have lost 12 relatives between them, all civilians, they insist. he buried two on companies and two cousins. >> when i saw their bodies in pieces, my heart wanted revenge. it still does. >> the remote control killers are president obama's weapon of choice, and not only in pakistan. they hunt down the enemy without boots on the ground. but one former british soldier with fresh and experience -- firsthand experience says drones make it too easy to kill.